Manganese Dendrites come in many different Weights. From 1 gram to 300 kilograms and beyond.
Jewelry sized are usually between 3 and 35 grams.
Small sized are 36 to 300 grams.
Medium sized are 301 grams to 2 kilograms.
Medium Large are 2 to 5 kilograms.
Large are 5 to 10 kilograms
Boulders are 10 kilograms and up.
And it goes on!
Of course, a paper thin dendrite that weighs 20 grams can have a feature size that is much larger than that on a 5 kilogram dendrite.
And if properly cut, some 5 kilogram dendrites can be turned into a 50 gram dendrite without any loss of value. (or you could make 100 fifty gram dendrites)